Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A New Alliance	Complete the Lost and Abandoned mission.
A Rival Silenced	Permanently defeat one of the Chosen.
Born in the Darkness	Get four kills from Shadow mode with a Reaper in a single mission.
Can't Stop the Fighting	Perform three offensive actions against the same target with a Skirmisher in a single turn.
Circle of Psi	Raise a Templar to maximum Focus level, spend it all, and reach the max again in a single mission.
Fully Operational Resistance	Raise XCOM's influence with all three factions to High in a single game.
It Takes Two	Form a level 3 bond between two soldiers.
No One Left Behind	Rescue a soldier who was captured by the Chosen.
Weary Warriors	Complete a mission with all Tired soldiers and no casualties.
Zombies in a Barrel	Get 15 Headshots against Lost in a single turn.